Cylinder paper making machine



Jan. 30, 1940. e. M. PE' I ERSON CYLINDER PAPER MAKING MACHINE Filed May6, 1957 :IIIF.

INVENTOR 607M Psru'esmv IZ ATTORNEYS Patented Jan. 30, 1940 UNITE STATESPATENT OFFICE Application May s, 1937. Serial No. 141,121

3 Claims.

This invention relates to improvements in cylinder paper makingmachines, and more particularly in the cylinder and means for rotatablymounting the same in working relation to the 5 pulp vat of said machine.

The usual paper making cylinder is constructed with an axial shaft andradially extended spokes or bracing from said shaft to a cylindricalframe carrying the paper making screen. The'cylinder is supported fromits axial shaft which is mounted in end bearings exteriorly of thecylinder and the pulp vat in which it rotates. Due to such constructionthe employment of spray pipes for action against the interior surface ofthe cylinder requires cumbersome connections with the interior of therotating axial shaft.

To simplify the construction for use of spray pipes I employ a hollowmaking cylinder which is devoid of axial shaft or radial bracingtherefrom, and support the cylinder for rotation by bearing rolls whichextend longitudinally through the hollow cylinder and upon which thecylinder rides for its rotation by bearing contact there-- with at theinner circumference of said cylinder. Such an arrangement leaves theopen ends of the cylinder free of obstruction whereby any desiredarrangement of stationarily mounted spray pipes may be extended into theinterior of said cylinder for action against the inner cylindrical wallthereof.

A further improvement consists in the means for adjustably mounting thebearing rolls which support the cylinder whereby at least one of saidbearing rolls constituting the main supporting element for the cylindermay be swung around upon its support so as to be located at the innercircumference of the cylinder directly opposite and in radial line withthe location 'ofthe usual couch roll which in these paper makingmachines is mounted to work-against the outside of the cylinder in theremoval of the pulp sheet therefrom as it is made. By thus mounting themain supporting bearing roll directly opposite the couch rollthe-working pressure from the latter is effectively counterbalancedbythe former so as to avoid any tendency of the cylinder being distortedor dislocated while in use. A second.supporting bearing roll ismountedfor extension within the cylinder in parallelism with the first hearingroll and circumferentially spaced therefrom for giving a broad base ofsupport for said rotatable cylinder, and the means for supporting saidsecond bearing roll is also adjustable circumferentially within thecylinder so as to secure the broad base of support desired. Prefer (Cl.9H3) ably also an idle counteracting roll is mounted to bear against theoutside of the cylinder directly opposite the second supporting bearingroll.

An important feature of the present invention consists in means formounting the supporting 6 bearing rolls for the paper making cylinder inbearings which are wholly outside of the pulp vat. This arrangementprotects the bearings from contact with the acidulated waters of thepulp vat from which they would rapidly wear 10 out. A disadvantage ofworn bearings is that the diiiiculties of preventing leakage into theends of the cylinder are increased by the looseness of such bearings. Onthe other hand, protected bearings may have more efficient lubricationwith consequent longer life. A further feature of the invention is inthe provision of supporting means for said bearing rolls and cylinderwhich are independent of the pulp vat whereby this part of the apparatusmay be readily adapted to exist- 0 ing pulp vats'which customers mayalready have installed.

Further details of construction and advantages of the presentimprovement 'will become apparent from the following/description. takenin connec tion with the accompanying drawing, in which,

Fig. 1 is an end view of the apparatus shown mounted in relation to theusual pulp vat which is shown in dotted lines; i

Fig. 2 is a view showing the cylinder in section 30 and the rollertrunnion support in elevation;

Fig. 3 is a fragmentary sectional detail of the peripheral frame of thecylinder; and V Fig. 4 is a similar fragmentary sectional detail takenat right angles to that in Fig. 3.

Referring more particularly to the drawing, the pulp vat of the usualconstruction as shown in dotted lines is indicated at l, and it will beunderstood that the flow of pulp is in the direction of the arrow 2 intothe'trough I partially surrounding the cylinder, and the water screenedtherefrom entering into the cylinder is withdrawn at the outlet 3 whichcommunicates with the interior of the cylinder as shown in Fig. 2. Thelevel of the water being drained from the interior of this cylinder isof course lower than the pulp-bearing water'of' the trough entering at 2as is the. usual practice in the working of these paper making cylindermachines.

The paper making cylinder indicated generally at 4 is made up of asturdy self-supporting peripheral frame comprising annular end plates 5(see Fig. 4), and a plurality of interior circular hoops 6 acting assupporting ribs and spaced apart at regular intervals throughout theaxial length of the cylinder and all tied to one another by tie rods I.Spacer sleeves 8 surround each tie rod 1 for keeping the hoops 6 spacedapart at proper intervals. The hoop assembly of members 6 l, and 8 isinturn secured to the end plates by tie rods 9. The inner fiatperipheral surfaces of said hoops 6 serve as bearing tracks for ridingon the supporting bearing rolls 2|, 24 as hereafter described. The outerperipheral portions ll) of the hoops 6 are tapered slightly as shown inFig. 4 and the narrow top edges thereof are notched at intervals aroundtheir circumference as indicated at |2 (Fig. 3), to receive bars l3,each of which has a flat base for fitting within the notches I2 and issomewhat triangular in cross section as shown in Fig. 3. The bars I3extend longitudinally for the full axial length of the cylinder and abutat their ends the end plates 5. The upper edges of the bars l3 are alsonotched at intervals throughout their length and receive in said notchescircumferentially disposed rings H which are disposed at equal intervalsthroughout the length of the bars l3 and upon the rings I4 is suitablysecured the screen mesh IS on which the pulp sheet is formed. Theannular end plates 5 of the cylinder are slidably sealed to ends of thepulp trough in suitable manner well understood in the art. It will beobserved that as thus constructed the paper making cylinder isessentially a self-supporting cylindrical shell devoid of any axialshaft or radially disposed spokes and carries on its outer periphery theusual paper making screen.

At each side of the pulp vat exteriorly thereof is a bearing standard orframe such as It and I! of generally triangular shape. At the top ofeach standard as for instance H, are pivotally mounted two bearingsupports or carrier members l8 and I9, both being pivotally mounted on acommon pivot in said standard H. The design and arrangement is such thatthe axis of the pivot 20 coincides with the axis of the cylinder 4 to besupported therefrom as hereinafter described. Upon the bearing supportI8 is suitably mounted one end bearing 20 for the main bearing roll 2 I,it being understood that the other .end bearing 22 is similarly mountedat the other The couch roll 26 is adjustably mounted in the end of aweighted arm 21 and as is well understood, the paper carrying felt 28moving in the direction of the arrows in Fig. l is brought into contactwith the surface of the cylinder 4 by said couch roll for continuouslycarrying away the pulp sheet as it is made on the cylinder. It will beobserved that the main supporting bearing roll 2| is mounted at theinside of the cylinder 4 directly opposite the couch roll 28 so as tocounteract the pressure therefrom. When ever any adjustment of the couchroll 26 on its arm 21 is required itbecomes possible by means of themounting shown, to likewise adjust the position of the bearing roll 2|on the inside periphery of said cylinder 4 so as always to be maintainedin direct opposition to said couch roll 26.

At each side of the main bearing roll 2| are located in stationaryposition the spray pipes 24 and 25 for ejecting steam, air or wateragainst the inner wall of the cylinder, and it is understood thatfurther spray pipes may be employed as desired for extending within saidcylinder 4. In the arrangement shown the spray pipe 24 discharges waterto clean any clogged pulp from the inside of the cylinder and the spraypipe 25 discharges air or steam to make more easy and rapid the transferof the pulp sheet from the cylinder 4 onto the felt 28 of the couchroll.

In the present construction it is contemplated that the cylinder 4 willbe driven from the couch roll 26 which in turn is rotated in the mannerwell known in the art. The friction driving pressure between said couchroll 26 and cylinder 4 is counteracted by the bearing roll 2|, which asbefore stated, furnishes a support for the inner periphery of. thecylinder 4 throughout its length. Flanges 2| on bearing roll 2| andflanges 24' on bearing roll 24 running closely adjacent the annular endplates 5 serve to retain the cylinder 4 against endwise shift.

A further feature to be mentioned in connection with the cylinder 4 isthat the spacer members 8 which surround the tie rods I (see Fig. 3)

are specially shaped to act as agitators in. stirring the water and inkeeping it in movement away from the entire interior of the initialmaking side of cylinder 4 and thus assist in keeping the inside of thecylinder free for the continuous and rapid formation of paper on theoutside thereof. The beveled sides of members 8 act as vanes or paddlestending to drive the water from the periphery toward the axis -of saidcylinder when said cylinder is rotating in the vat. In order to providea more steady support for the cylinder upon its bearing rolls 2|, 24 asupplemental steadying roll is mounted in a bearing 30' extending fromthe vat I, so as to bear on the outside of the cylinder opposite tosupplemental bearing roll 24 as shown in Fig. 1.

It has been found in the use of the apparatus as shown that paper willbe formed much more rapidly on the outside of the cylinder than is 1. Ina cylinder paper machine comprising a pulp vat, a paper making cylinderrotating therein, and a couch roll, said cylinder having an openinterior devoid of axial shaft and radial bracing and being providedwith internal bearing surfaces circularly disposed at the innercircumference of said cylinder, the combination therewith of. a pair ofspaced apart bearing rolls extending through said cylinder above itsaxis of rotation and in rolling engagement with the internal bearingsurfaces of said cylinder for supporting said cylinder in its rotation,said bearing rolls being joumaled in carrier members mounted exteriorlyof said pulp vat, supporting standards, the carrier members for one ofsaid bearing rolls being pivoted in said standards at the axis ofrotation of said cylinder, and means for adjusting said carrier membersabout their pivotal support to vary the position of said bearing rollcircumferentially within said cylinder.

2. In a cylinder paper machine comprising a pulp vat, a paper makingcylinder rotating therein, and a couch roll, said cylinder having anopen interior devoid of axial shaft and radial bracing and beingprovided with internal bearing surfaces circularly disposed at the innercircumference of said cylinder, the combination therewith of a pair ofspaced apart bearing rolls extending through said cylinder above itsaxis of rotation and in rolling engagement with the internal bearingsurfaces of said cylinder for. supporting said cylinder in its rotation,said bearing rolls being journaled in carrier members mounted exteriorlyof. said pulp vat, supporting standards, the carrier members for one ofsaid bearing rolls being pivoted in said standards at the axis ofrotation of said cylinder, adjustable struts connecting said standardsandsaid carrier members for adjusting said carrier members about theirpivotal support and for positioning said bearing roll directlyoppositesaid couch roll.

3. In a cylinder paper machine comprising a pulp vat, a paper makingcylinder rotating therein, and a couch roll, said cylinder having anopen interior devoid of axial shaft and radial bracing and beingprovided with internal bearing surfaces circularly disposed at the innercircumference of said cylinder, the combination therewith of. a pair ofspaced apart bearing rolls extending through said cylinder above itsaxis of rotation and in rolling engagement with the internal hearingsurfaces of said cylinder for supporting said cylinder in its rotation,said bearing rolls being journaled in carrier members mounted exteriorlyof said pulp vat, one of said bearing rolls being positioned directlyopposite said couch roll, the other bearing roll being spacedcircumferentially therefrom, and an outside steadying roll mounted forrolling engagement with the outer periphcry of said cylinder. directlyopposite said last named supporting bearing roll.

GUY M. PETERSON.

